An item composed of one or more materials, molded, compressed, and/or baked into a rigid covering of irregular shapes and sizes. it is designed to cover air ducts and/or air duct fittings used in air conditioning, heating, cooling, pressurizing and de-icing systems to restrict the dissipation of heat. it may completely or partially encase the item for which designed. it may be furnished with or without fillers, cement, and/or separate or attached accessories for installation, (excluding flexible air duct covering and rigid pipe and pipe fitting coverings used in construction and building materials). Excludes insulation blanket, thermal, aircraft; insulation pipe fitting covering, thermal; and insulation sleeving, thermal.
Classification: Other parts of airplanes or helicopters for use in military aircraft (excludes propellers, rotors, undercarriages, and parts thereof)
NSN 6610-01-061-1875
NSN 6620-01-072-1034
NSN 5965-01-564-2860
NSN 5965-01-399-8454
NSN 5930-00-149-1696
NSN 2925-00-800-4685
NSN 6620-00-779-5859
NSN 5935-00-796-1731
NSN 5998-01-258-6221
NSN 7035-01-182-1086
NSN 5996-01-487-1053
NSN 5895-00-182-4763